Hey man,
As MonkeyDAthos said use octaves. If you look carefully to the fretboard you will see that there are some shortcuts.
For example; Take the note on the first fret of the low E string. It is a F. If you move +7 frets on the higher string
(A string) which is 8th fret of the A string, you will get another F.(1+7=8th fret) If you move +2 frets on the 2 higher
string (D string) which is 3rd fret of the D string you will get another F.(1+2=3th fret)
Then you will notice there are some rules which are;
- +7 frets on the first higher string
- +2 frets on the second higher string (You can get this by the 5 fret rule between the strings also)
And since the last string is another E the notes are same as the low E. Also this same structure repeats itself after the
12th fret by +12 rule (Meaning 1st fret Low E string = (1+12)13th fret Low E string)
I'm also adding a picture for you to see what i said
Hope that helps.
Dogukan,
PS: Sorry for english. I think i did some mistakes as i wrote